[....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 16.465433] random: sshd: uninitialized urandom read (32 bytes read, 32 bits of entropy available) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 20.507490] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 20.868543] random: sshd: uninitialized urandom read (32 bytes read, 38 bits of entropy available) [ 21.642960] random: sshd: uninitialized urandom read (32 bytes read, 91 bits of entropy available) [ 22.995207] random: sshd: uninitialized urandom read (32 bytes read, 96 bits of entropy available) Warning: Permanently added '10.128.0.39' (ECDSA) to the list of known hosts. [ 28.510225] random: sshd: uninitialized urandom read (32 bytes read, 102 bits of entropy available) executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.613654] sg_write: data in/out 327644/100 bytes for SCSI command 0x0-- guessing data in; [ 28.613654] program syzkaller146304 not setting count and/or reply_len properly [ 28.619893] sg_write: data in/out 327644/100 bytes for SCSI command 0x0-- guessing data in; [ 28.619893] program syzkaller146304 not setting count and/or reply_len properly executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 28.659532] kasan: CONFIG_KASAN_INLINE enabled executing program executing program executing program [ 28.663969] kasan: GPF could be caused by NULL-ptr deref or user memory accessgeneral protection fault: 0000 [#1] PREEMPT SMP KASAN [ 28.733588] Dumping ftrace buffer: [ 28.737098] (ftrace buffer empty) [ 28.740774] Modules linked in: [ 28.744049] CPU: 0 PID: 3327 Comm: syzkaller146304 Not tainted 4.4.107-g610c835 #4 [ 28.751722] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 28.761043] task: ffff8800b4d78000 task.stack: ffff8800b7c80000 [ 28.767067] RIP: 0010:[] [] __free_pages+0x21/0x90 [ 28.775295] RSP: 0018:ffff8800b7c879c0 EFLAGS: 00010a07 [ 28.780712] RAX: dffffc0000000000 RBX: dead4ead00000000 RCX: ffffffff825b8ccb [ 28.787949] RDX: 1bd5a9d5a0000003 RSI: 0000000000000000 RDI: dead4ead0000001c [ 28.795186] RBP: ffff8800b7c879d0 R08: ffffed003a5b6cd0 R09: ffff8801d2db6660 [ 28.802423] R10: 0000000000000005 R11: ffffed003a5b6cd0 R12: 0000000000000004 [ 28.809660] R13: 0000000000000020 R14: ffff8801d5294200 R15: dffffc0000000000 [ 28.817335] FS: 0000000000000000(0000) GS:ffff8801db200000(0063) knlGS:00000000f7789b40 [ 28.825634] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 [ 28.831486] CR2: 00000000205c3000 CR3: 00000001d24b8000 CR4: 00000000001406f0 [ 28.838725] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.845961] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.853197] Stack: [ 28.855311] 0000000000000000 ffff8801d5294358 ffff8800b7c87a30 ffffffff825b8cf1 [ 28.863270] ffff8801d5294370 ffffed003aa5286b ffffed003aa5286e ffff8801d5294368 [ 28.871238] dead4ead00000000 ffff8801d5294340 0000000000000000 0000000000000000 [ 28.879192] Call Trace: [ 28.881750] [] sg_remove_scat.isra.17+0x1c1/0x2d0 [ 28.888210] [] sg_finish_rem_req+0x2b5/0x340 [ 28.894232] [] sg_read+0xa21/0x1490 [ 28.899475] [] ? mark_held_locks+0xaf/0x100 [ 28.905413] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.912046] [] ? fsnotify+0xee0/0xee0 [ 28.917466] [] ? avc_policy_seqno+0x9/0x20 [ 28.923317] [] do_loop_readv_writev+0x141/0x1e0 [ 28.929604] [] ? security_file_permission+0x89/0x1e0 [ 28.936322] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.942954] [] ? sg_proc_seq_show_debug+0xd30/0xd30 [ 28.949595] [] compat_do_readv_writev+0x5df/0x6e0 [ 28.956062] [] ? vfs_writev+0xb0/0xb0 [ 28.961480] [] ? __fget+0x20b/0x3b0 [ 28.966723] [] ? __fget+0x232/0x3b0 [ 28.971966] [] ? __fget+0x47/0x3b0 [ 28.977121] [] compat_readv+0xd9/0x140 [ 28.982625] [] compat_SyS_readv+0xd8/0x1b0 [ 28.988474] [] ? SyS_pwritev+0x230/0x230 [ 28.994152] [] ? vmacache_update+0xfe/0x130 [ 29.000091] [] ? do_fast_syscall_32+0xd7/0x890 [ 29.006288] [] ? SyS_pwritev+0x230/0x230 [ 29.011962] [] do_fast_syscall_32+0x314/0x890 [ 29.018075] [] sysenter_flags_fixed+0xd/0x17 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.024097] Code: 76 ae 0c 00 e9 78 fd ff ff 90 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 48 89 fb 48 83 c7 1c 48 89 fa 48 83 ec 08 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 49 [ 29.050590] RIP [] __free_pages+0x21/0x90 [ 29.056474] RSP executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 29.620715] ---[ end trace 984b070009103664 ]--- [ 29.627450] Kernel panic - not syncing: Fatal exception [ 29.633323] Dumping ftrace buffer: [ 29.636839] (ftrace buffer empty) [ 29.640521] Kernel Offset: disabled [ 29.644114] Rebooting in 86400 seconds..